On the SitePoint Web Tech blog there's a new post just for those looking to move their site(s) over to a Drupal installation - a quick technique for importing your information into a shiny new Drupal instance.

One of the most painful steps in any web system is importing content — especially so with Drupal. It is something that I have always dreaded. [...] That is all in the past. I am happy now. I recently discovered a module that is a crown jewel in the Drupal Contrib community — Feeds.

With the Feeds module you can directly pull the information in from the feeds your site already provides (or ones you could whip up quickly) and pull it directly into your new site - even CSV content will work.